quic-go is an implementation of the QUIC protocol in Go. In versions prior to 0.49.0, 0.54.1, and 0.55.0, a misbehaving or malicious server can cause a denial-of-service (DoS) attack on the quic-go client by triggering an assertion failure, leading to a process crash. This requires no authentication and can be exploited during the handshake phase. This was observed in the wild with certain server implementations. quic-go needs to be able to handle misbehaving server implementations, including those that prematurely send a HANDSHAKE_DONE frame. Versions 0.49.0, 0.54.1, and 0.55.0 discard Initial keys when receiving a HANDSHAKE_DONE frame, thereby correctly handling premature HANDSHAKE_DONE frames.
CVE-2025-59530
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 92% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EPSS
- 35.7%
- KEV
- Not listed
Published
October 10, 2025
Last Modified
April 15, 2026
References (3)
- security-advisories@githubhttps://github.com/quic-go/quic-go/blob/v0.55.0/connection.go#L2682-L2685
- security-advisories@githubhttps://github.com/quic-go/quic-go/pull/5354
- security-advisories@githubhttps://github.com/quic-go/quic-go/security/advisories/GHSA-47m2-4cr7-mhcw
Vendor Advisories for CVE-2025-59530(8)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:36873Red Hat Product SecurityHigh
Red Hat Security Advisory: Submariner v0.20 security fixes and container updates
- RHSA-2025:23131Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Container Release Update
- RHSA-2025:23069Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update
- RHSA-2025:22784Red Hat Product SecurityMedium
Red Hat Security Advisory: Submariner v0.22 security fixes and container updates
- RHSA-2025:21892Red Hat Product SecurityMedium
Red Hat Security Advisory: Submariner v0.21 security fixes and container updates
- RHSA-2025:21775Red Hat Product SecurityMedium
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
- RHSA-2025:21768Red Hat Product SecurityMedium
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update
- RHSA-2025:21706Red Hat Product SecurityMedium
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.4 Product Security and Bug Fix Update
Patch Availability(6)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| redhat | ansible-automation-platform-25/receptor-rhel8:1.6 | 2025-12-11 | redhat |
| redhat | receptor-0:1.6.2-1.el9ap | 2025-12-10 | redhat |
| redhat | rhacm2/lighthouse-coredns-rhel9:v0.22-1764857721 | 2025-12-04 | redhat |
| redhat | rhacm2/lighthouse-coredns-rhel9:v0.21-1762794442 | 2025-11-20 | redhat |
| redhat | receptor-0:1.6.2-2.el9ap | 2025-11-19 | redhat |
| redhat | ansible-automation-platform-26/receptor-rhel9:1.6 | 2025-11-19 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/quic-go/quic-go | — | 0.54.1 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(1)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 9× in last 7d / 43× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 119 total refreshes for this CVE.
- 2026-07-22 14:08 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)
Same vendor
10 shownredhat · msrc
Same CWE
10 shownCWE-755 · CWE-617
- CVE-2009-5043EG 9.8CRITICAL
- CVE-2018-19991EG 9.8CRITICAL
- CVE-2017-2877EG 9.8CRITICAL
- CVE-2017-5638EG 9.8 KEVEPSS 100%CRITICAL
- CVE-2018-0155NVD 8.6EG 9.0 KEVEPSS 94%HIGH
- CVE-2018-0934NVD 7.5EG 9.0EPSS 99%HIGH
- CVE-2018-8039EG 8.1EPSS 95%HIGH
- CVE-2018-19963EG 7.8HIGH
- CVE-2018-11921EG 7.8HIGH
- CVE-2017-7518NVD 5.5EG 7.8MEDIUM
Frequently asked(5)
What is CVE-2025-59530?
When was CVE-2025-59530 disclosed?
Is CVE-2025-59530 actively exploited?
What is the CVSS score of CVE-2025-59530?
How do I remediate CVE-2025-59530?
Dependency Blast Radius
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